问题
单项选择题
血浆ACTH浓度有昼夜节律性，其最高值一般在每天的（）。
A.4：00
B.8：00
C.12：00
D.16：00
E.20：00
答案
参考答案：B
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血浆ACTH浓度有昼夜节律性，其最高值一般在每天的（）。
A.4：00
B.8：00
C.12：00
D.16：00
E.20：00
参考答案：B
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| The seasons in Australia are the opposite of ours. 1 it is winter here, it is summer there. Australia is 2 the south of the world. July and August are the winter months. The summer is in December, _ 3 and February. The north of the country is 4 than the south. Australia' s main problem is water. A 5 large part of the country has no rain at all. But east coast has the rain _6 the year round. There are no dry months here. In March 1982, there was a terrible drought in Australia. The summer rain didn't 7 . There were 138 million sheep in Australia this year. This was 14% of all the sheep in the world, Because there was no 8 rain, the grass didn't grow well, the farmers 9 to sell many of their sheep and many sheep 10 , too. It was a great disaster for Australia farmers.
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