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问题 单项选择题

诊断病毒性脑膜炎惟一可靠的方法是（）

A.PCR检查脑脊液中的病毒

B.有无头痛

C.有无脑膜刺激征

D.血清或脑脊液中病毒抗体滴度的增高

E.病毒分离和组织培养

答案

参考答案：E

填空题

压强的国际单位Pa是____单位，Pa用基本单位可以表示为____。
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单项选择题

What is TRUE about hoisting operations（）.

A.Personnel may work beneath suspended loads，as long as they are alert and wear hard hats

B.If a suspended load with no tag begins to spin，personnel should attempt to stop the spinning if the load is within reach

C.If tag lines are used to control a suspended load，they should be secured to the deck

D.Personnel not involved in the hoisting operation should be kept clear of the transfer area
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