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问题 单项选择题

1956年，在中央政治局扩大会议上，毛 * * 提出与民主党派实行（）的方针。

A、“长期共存，互相监督”

B、“长期合作，共同发展”

C、“肝胆相照，荣辱与共”

答案

参考答案：A

单项选择题

As viewed from space, the Earth’’s distinguishing characteristics are its blue waters and white clouds. Enveloped by an ocean of air consisting of 78% nitrogen and 21% oxygen, the planet is the only one in our solar system known to harbor life. Circling the Sun at an average distance of 149 million km (93 million miles), the Earth is the third planet from the Sun and the fifth largest planet in the solar system. Its rapid spin and molten nickel-iron core give rise to an extensive magnetic field which, coupled with the atmosphere, shields us from nearly all of the harmful radiation coming from the Sun and other stars. Most meteors burn up in the Earth’’s atmosphere before they can strike the surface. The planet’’s active geological processes have left no evidence of the ancient pelting it almost certainly received soon after it was formed. The Earth has a single natural satellite — the Moon.

Why does the Earth show almost no signs of having been hit by numerous meteors in the past

A．Humans have built over most of the craters.

B．Most meteors fell into the ocean and not on land.

C．The Earth’s magnetic field repelled most meteors.

D．The Earth’s natural geologic activity has eliminated most traces.
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单项选择题 A1/A2型题

关于手消毒不正确的做法是（）。

A.水龙头应用非手触式开关

B.肥皂应保持干燥或用瓶装液体肥皂，每次使用时压出

C.洗手后采用红外线自动干手机将手吹干

D.设置公用擦手巾

E.肝炎或结核专业检验室工作人员应戴手套
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