【简答题】预防间接接触触电的技术措施有( )。 A绝缘、屏护 B保护接地 C保护接零 D保护接地或保护接零
【单选题】《中国共产党问责条例》自( )之日起施行。
【单选题】If the error rate of physical link is high, error detection and retransmission is usually more efficient
【单选题】膨胀珍珠岩 可配得密度在 范围的水泥浆。
【单选题】In order to be more productive and efficient, the board decided to ______ a sound system of operation.
【单选题】The efficient rate of emissions occurs when:
A.
there is absolutely no damage done to a pristine environment.
B.
government forbids all pollution no matter what the cost.
C.
the marginal social benefits of pollution exceed the marginal social costs of pollution.
D.
the change in social benefits and the change in social costs due to an additional unit of emissions are equal.
【单选题】阅读U10的“话题导言”及“开口说”部分,完成以下中英文的匹配选择题。 酒店规模
D.
the ground of the hotel