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【单选题】
实验室安全防护主要指与实验室工作密切相关的涉及设备、人员和公共安全的事项,如 防毒、防火、防爆、防灼伤、防触电、防辐射以及高压容器和( )的防护。A.
网络安全
B.
运输安全
C.
通讯安全
D.
生物安全
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【单选题】听力原文： We have just climbed out of a spaceship onto the surface of the moon. Behind us is the ship, half in the sunlight and half in deep shadow. A few miles ahead is a wall of mountains towering again...
A.
On the earth.
B.
On the moon.
C.
At sea.
D.
In a spaceship.
【简答题】—Have you nearly finished? — , we have just begun. A. Aboveall B. After all C. Onthe contrary D. On the other hand
【单选题】下列经济活动中,引起负债之间彼此增减的是( )
A.
收到应收账款,存入银行
B.
向银行借入款项直接偿还应付账款
C.
用银行存款偿还长期负债
D.
用现金支付职工工资
【单选题】We ______our dinner when a policeman came to the door.
A.
just had
B.
have just had
C.
just have had
D.
had just had
【单选题】We don’t live here;we_____.
A.
just visit
B.
are just visiting
C.
just visited
D.
have just visited
【单选题】Bad luck! We Mount Emei when it rained heavily.
A.
climbed
B.
are climbing
C.
were climbing
D.
have climbed
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