Perhaps the most familiar plant
movement belongs to one species of mimosa called the sensitive plant. Within
seconds, it can lower its leaves and make its tiny leaflets close up like
folding chairs. This movement is thought to be initiated by electrical impulses
remarkably similar to nerve signals in animals. But without the animals’
sophisticated motion machinery, the mimosa has had to be creative in devising a
way to move. For motion, the plant depends on tiny, bulb-shaped organs located at the base of each leaf stalk and leaflet. Called pulvini, these organs hold the plant parts in place. When the mimosa is stimulated--say, by a crawling insect or a sudden change in temperature--an electrical impulse sweeps through the plant. This causes potassium and then water to be shifted from certain cells in the pulvini to others, quickly turning one side of the A. reacts to outside stimulation B. has smaller leaves than most other plants C. depends on organs called pulvini D. contains potassium and water [判断题]工作班成员(不包括工作负责人) 共 人,填写除工作负责人以外的全体工作班成员的数量。
A.正确 B.错误 [单项选择]上呼吸道、肺、肾的肉芽肿()
A. Wegener肉芽肿 B. Kartagener综合征 C. Goof-pasture综合征 D. Meigs综合征 E. 阿司匹林三联症 [单项选择]人员变动办理交接,由()或信用社相关业务负责人审查监交。
A. 储蓄主管主任 B. 主管主任 C. 会计方管 D. 储蓄柜员 [单项选择]促使我国豆油价格走高的产业政策因素是()。
A. 降低豆油生产企业贷款利率 B. 提高对国内大豆种植的补贴 C. 放松对豆油进口的限制 D. 对进口大豆征收高关税 [判断题] 继电保护远方操作时,至少应有一个指示发生对应变化,且所有这些确定的指示均已同时发生对应变化,才能确认该设备已操作到位。
A.正确 B.错误 [单选题]因受风寒而头痛,典型症状是?
A.头部刺痛 B.偏头痛 C.眩晕 [判断题]冷却器用于牵引部和左右截割部降温。
A.正确 B.错误 [判断题]钻孔时,孔内水位宜高于护筒底口0.5m以上或地下水位以上1.5m~2.0m,在冲击钻进中取涟时和停钻后,应及时向孔内补水或泥浆,保持水头高度和泥浆比重及黏度。
A.正确 B.错误 [单选题]女性,78岁。浅表淋巴结肿大3年,近2个月来出现明显消瘦、乏力伴皮肤瘙痒。肝肋下1 cm,脾肋下4 cm。实验室检查:Hb 86 g/L,WBC 56×109/L,BPC 120×109/L。骨髓增生明显活跃,淋巴细胞占80%,其中以成熟小淋巴细胞为主,红系、粒系增生减低。血清蛋白电泳示γ球蛋白减少。淋巴结活检病理示淋巴组织增生,以小淋巴为主。噬异凝集试验阴性。本例最可能的诊断是:( )
A.急性淋巴细胞白血病 B.慢性淋巴细胞白血病 C.淋巴瘤 D.传染性单核细胞增多症 E.传染性淋巴细胞增多症 [单选题]接地线的( )应登记注册,交接班时注意交接。
A.数量 B.号码 C.数量、号码 D.分别 [多项选择]根据《民事诉讼法》,合同当事人可以在书面合同中协议选择的( )人民法院管辖。
A. 双方约定的其他地方 B. 原告住所地 C. 被告住所地 D. 合同履行地 E. 合同签订地 [填空题]对洗选煤厂实施直接管理的()是瓦斯冶理工作的第一责任人。())对于洗选煤厂瓦斯防治工作负技术责任,()对()负责。
[单选题]预防手术后感染的最重要的措施是
A.提高机体抵抗力 B.术前、术中、术后大量应用抗生素 C.避免休克发生 D.术后早期离床活动 E.严格遵守无菌操作的原则 [多选题]公共航空运输企业运输危险品,应当遵守国家有关规定。下列说法正确的是( )。
A.禁止以非危险品品名托运危险品 B.禁止旅客随身携带危险品乘坐民用航空器 C.禁止违反国务院民用航空主管部门的规定将危险品作为行李托运 D.没有明文规定 [不定项选择题]《建设项目环境影响报告表(试行)》要求填报的内容包括( )。
A.公众参与 B.环境影响分析 C.建设项目工程分析 D.建设项目所在地自然环境和社会环境简况 [判断题]指挥机车向显示人方向稍行移动的调车手信号:昼间——展开的绿色信号旗在下部左右摇动。
A.正确 B.错误 [单项选择] A breakthrough in the provision of energy from the sun for the European Economic Community could be brought forward by up to two decades, if a modest increase could be provided in the EEC’’ s research effort in this field, according to the senior EEC scientists engaged in experiments in solar energy at EEC’’ s scientific laboratories at Ispra, near Milan.
The senior West German scientist in charge of the community’’ s solar energy program, Mr. Joachim Gretz, told journalists that at present levels of research spending it was most unlikely that solar energy would provide as much as three percent of the Community’’ s energy requirements even after the year 2000. But he said that with a modest increase in the present sums, devoted by the EEC to this work it was possible that the breakthrough could be achieved by the end of the next decade.
Mr. Gretz calculates that if solar energy only provided three percent of the EEC’’ s needs, this could still produce a saving of about a bil
A. The desired breakthrough could be obtained by the end of the next decade if investment were increased. B. At the present level of research spending, it is difficult to make any significant progress in the provision of energy from the sun. C. The EEC spends one billion pounds on imported energy each year. D. The total yearly spending of the EEC on solar energy research amounted to almost 6 million dollars. [多选题]【53033】调度指令包适( )。 ( )
A.综合令 B.口头令 C.单项令 D.逐项令 [单选题]下表是四位儿童的斯坦福~比内智力测验结果,心理年龄超过8岁的儿童是 四位儿童的生理年龄与比率智商 姓名 生理年龄 比率智商 小明 6 120 小丽 7 115 小刚 8 95 小芳 9 90
A.小明、小丽 B.小丽、小芳 C.小刚、小芳 D.小刚、小明 我来回答: 提交
|