我国山东半岛的成山头附近海面，由于（）偏北风通常比周围要大1

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问题单项选择题

我国山东半岛的成山头附近海面，由于（）偏北风通常比周围要大1～2级左右，有中国的好望角之称。

A．狭管效应

B．波流效应

C．岬角效应

D．海陆热力差异作用

答案

参考答案：C

选择题

PbO₂是褐色固体，受热分解为Pb的+4和+2＋4价的混合氧化物，+4价的Pb能氧化浓盐酸生成Cl₂；现将1mol PbO₂加热分解得到O₂，向剩余固体中加入足量的浓盐酸得到Cl₂，O₂和Cl₂的物质的量之比为3∶2，则剩余固体的组成及物质的量比是

A．1∶1混合的Pb₃O₄、PbO

B．1∶2混合的PbO₂、Pb₃O₄

C．1∶4∶1混合的PbO₂、Pb₃O₄、PbO

D．4∶1∶1混合的PbO₂、Pb₃O₄、PbO

改错题

六. 短文改错（10分）

They were marching towards a building then 81._____________

they suddenly realized what the officer hadn’t left 82. _____________

him enough time to give the order to turn round 83. _____________

and to stop. So they went on marching straight 84. _____________

into the wall. The soldiers smiled happy as each of 85. _____________

those in the front line decide at the same time to walk 86. _____________

ahead. There was loud noise as they hit the wall 87. _____________

one after another. But before any of them had 88. _____________

no time to smile again, the officer shouted, “If you 89. _____________

have been in a really straight line, I could have heard 90. _____________

only one sound when you hit the wall!”