[填空题]
Scientists have developed a new cancer drug. So far, they have
tested it only on{{U}} (36) {{/U}}animals. The drug is designed to{{U}}
(37) {{/U}}and kill cancer cells but not healthy cells.
First, the drug enters the cancer and destroys the supply of blood. Then
it releases{{U}} (38) {{/U}}to destroy the cancer cells.
Researchers at the Massachusetts Institute of Technology in Cambridge
carried out the study. The{{U}} (39) {{/U}}appeared in Nature{{U}}
(40) {{/U}}. A school news release called the drug an "anti-cancer
smart bomb."
Ram Sasisekharan is a professor at M.I.T. He says
his team had to{{U}} (41) {{/U}}three problems. They had to find a way
to destroy the blood vessels, then to{{U}} (42) {{/U}}the growth of new
ones. But they also needed the blood vessels to supply chemicals to destroy the
cancer.
So, the researchers designed a two-part "nanocell". The
cell is{{U}} (43) {{/U}}in nanometers, or
[单选题] 以下哪一组是婴儿必需氨基酸( )
A. 蛋氨酸、酪氨酸、异亮氨酸
B. 光氨酸、赖氨酸、亮氨酸
C. 苏氨酸、缬氨酸、组氨酸
D. 赖氨酸、精氨酸、色氨酸
E. 色氨酸、苯丙氨酸、丙氨酸
[多选题]母线电压合并单元与间隔合并单元级联时可采用()方式
A.IEC61850-9-2点对点
B.IEC61850-9-2组网
C.国家电网公司扩展IEC60044-8点对点
D.标准IEC60044-8点对点
[多项选择]中年消费者的心理与行为包括( )。
A. 购买的理智性胜于冲动性
B. 购买的计划性多于盲目性
C. 冲动性购买多于计划购买
D. 购买有主见,不受外界影响
E. 购买随俗求稳,注重商品的便利
[单选题]腰带和保险带、绳应有足够的机械强度,材质应耐磨,卡环(钩)应具有保险装置,操作应灵活。保险带、绳使用长度在()以上的应加缓冲器。
A.2m
B.3m
C.4m
D.5m
[单选题]
从旋塞阀阀盖上卸旋塞装载螺钉只能在( )情况下进行操作。
A.全开
B.全关
C.不带压
D.带压
[单选题]在接触网支柱及接触网带电部分( )m范围以内的金属结构均必须接地,在与接触网相连的支柱及金属结构上,若未装设接地线或接地线已损坏时,严禁人员与之接触。
A.5
B.8
C.12
D.10
[单选题]职员职级序列实施过程中,省公司人力资源部的职责不包括()。
A.负责制定职员职级实施细则,核定职员职数$
B.$负责确定年薪制职员的薪酬标准$
C.$负责对各单位职员聘任方案备案$
D.$负责监督、考核各单位职员的管理执行情况
[多选题] 企业民主监督的主要形式有( )。
A.职工代表大会
B.企业工会组织
C.群众安全监督检查网(岗)
D.社会监督
[单选题]与参苓白术散主治病证病机无关的是
A.肺气不足
B.脾肾两虚
C.湿阻气滞
D.脾虚夹湿
[简答题]假设今天的日期是2020年5月12日,请说出下列哪些品类不属于国标免费范围?
[单选题]《生产经营单位安全培训规定》规定:生产经营单位主要负责人和安全生产管理人员每年再培训时间不得少于( )学时。
A.12
B.40
C.一周
D.一月
[单项选择]在光照下石蜡也会变()。因此,要求石蜡具有良好的热安定性、氧化安定性和光安定性。
A. 黑
B. 红
C. 绿
D. 黄
[单选题]杭绍线半自动车钩的最大垂直摆角为:( )。
A. ±40度
B.±15度
C.±6度
D.±25度
[判断题]NAT技术难以解决目前IP地址资源紧张的问题。
[多选题]以下关于隧道排水作业的规定中.正确的是( )
A.隧道内反坡排水方案应根据距离、坡度、水量和设备情况确定
B.抽水机排水能力应大于排水量的10.%.并应有备用台数
C.隧道顺坡排水沟断面应满足隧道排水需要
D.膨胀岩、土质地层、同岩松软地段应铺砌水沟或采用管槽排水
E.遇渗漏水断积或水量突然增加.应立即停止施工.人员撤至安全地点
[多选题]保持车控室对外服务形象,当班员工不得随意进入车控室,且车控室最多不得超过( ),折返站( ) 。
A.两人
B.三人
C.四人
D.五人
[判断题]商业汇票的付款期限,最长不得超过9个月()
A.正确
B.错误
[单项选择]
Why Pop Music Sounds Perfect
If you haven’t been listening to pop radio in the past few months, you’ve missed the rise of two seemingly opposing trends. In a medium in which mediocre singing has never been a bar to entry, a lot of pop vocals suddenly sound great. Better than great: note- and pitch-perfect, as if there’s been an unspoken tightening of standards at record labels or an evolutionary leap in the development of vocal cords. At the other extreme are a few hip-hop singers who also hit their notes but with a precision so exaggerated that on first listen, their songs sound comically artificial, like a chorus of 50s robots singing Motown.
The force behind both trends is an ingenious plug-in called Auto-Tune, a downloadable studio trick that can take a vocal and instantly nudge it onto the proper note or move it to the correct pitch. It’s like Photoshop for the human voice. Auto-Tune doesn’t make it possible for just
A. a pop singer
B. a studio engineer
C. a sound technician
D. a computer programmer
[多选题]EMC 测试内容有( )。
A.高频电磁骚扰发射测量
B.低频电磁骚扰发射测量
C.产品干扰度测试
D.产品抗扰度测试
[填空题] 调动装有超限及跨装货物车辆时,调车领导人应按有关( )在布置作业计划的同时,通知( )和其他有关人员。
[单选题]机体的内环境是指
A.细胞内液
B.组织液
C.细胞外液
D.脑脊液
E.淋巴液
[判断题]制图中的剖面图和剖视图不同,它只将剖面的形状画出来,而没有剖到的部分不画出来。( )
A.正确
B.错误
[单项选择]补钙药物龙牡壮骨冲剂的主要成分是()
A. 无机钙
B. 有机钙
C. 天然钙
D. 氨基酸螯合钙
[判断题]电话闭塞法行车时,站前折返的闭塞解除条件为列车整列到达折返线并停稳。
A.正确
B.错误
[填空题]装有蜜蜂的车辆,与标有( )的农药车不得编入同一列车。