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{{B}}Bees and Color{{/B}} On our table in the garden we put a blue card, and all around this blue card we put a number of different gray cards. These gray cards are of all possible shades of gray land include white and black. On each card a watch-glass is placed. The watch-glass on the blue card has some syrup (果汁) in it; all the others are empty. After a short time bees find the syrup, and they come for it again and again. Then, after some hours, we take away the watch-glass of syrup which was on the blue card and put an empty one in its place. Now what do the bees do They still go straight to the blue card, although there is no syrup them. They do not go to any of the gray cards, in spite of the fact that one of the gray cards is of exacfiy the same brightness as the blue ca [单选题]液体质点流速的大小和方向沿流程不变的流动称为( )。
A.有压流 B.无压流 C.恒定流 D.均匀流 [单选题]沟通中属于引导性问题的是（）
A.您是因为看不清才过来检查的吗 B.您戴眼镜吗 C.您的眼睛是怎么受伤的呢 D.您旧眼镜戴的舒服吗 [单项选择]某工厂出厂一批零件，包含A、B、C三种，其中A、B两种零件总数是C的7倍。已知A零件出厂单价为83元，B零件出厂单价为79元，C零件出厂单价为3元，这批零件总价为16604元。请问A零件有多少个
A. 120 B. 89 C. 83 D. 70 [单项选择]患者，女，30岁，3个月来发热，盗汗，伴有腹胀、腹痛。皮肤无黄疸，颈静脉无怒张，两肺正常，心浊音界正常。腹水蛋白定量30g／L。可能的诊断是（）
A. 肠结核 B. 卵巢囊肿 C. 门静脉血栓形成 D. 结核性腹膜炎 E. 肝硬化失代偿期，腹水 [多选题]队旗分为( )等级。
A.部级 B.局级 C.总队级 D.支队级 [多选题]机房及相关设施的（ ），应符合有关标准、规范的要求。
A.接地电阻 B.过电压保护性能 C.额定功率 D.额定电压 [多选题]以下属于起重作业“十不吊”的有（ ）。
A.超载、指挥信号不明。 B.捆绑不牢。 C.吊物上站人或有浮置物。 D.吊件组装部完整。 [单项选择]某企业某年度取得应税利润600万元，销售收入1600万元，如果以应税利润为征税对象，采用超率累进税率形式(税率表如下)，则该企业本年应纳税额为( )万元。
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