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问题 多项选择题

关于自动化仪表线路安装要求说法正确的是()。

A.当线路环境温度超过65℃时应采取隔热措施，当线路附近有火源场所时，应采取防护措施 

B.线路从室外进入室内时应有防水和封堵措施 

C.线路的终端接线处及经过建筑物的伸缩缝和沉降缝处应留有余度 

D.电缆槽垂直段大于2m时，应在其中部增设支架;电缆槽成排拐弯时弧度应一致 

E.保护管弯曲后的角度不应大于90度

答案

参考答案：A, B, C

单项选择题

下列哪项情况适宜作穿刺检查（）

A.肝管细胞癌

B.继发性肝癌

C.肝包囊虫病

D.阿米巴肝脓肿

E.肝细胞癌
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单项选择题

Which of the following is NOT an advantage of exchange traded funds (ETFs) over traditional mutual funds.’（）

A. ETF shares trade throughout the day at continuously updated prices, while open-end funds trade only once a day at close-of-market prices.

B. The exposure to capital gains taxes is lower for ETFs than for open-end funds.

C. ETF shares have smaller bid-ask spreads than open-end mutual funds.
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