肠内营养的给予方法不妥的是()A．分为分次给予和连续输注两种方法 B．分次给予，每次

When I was there, he was still working. He said that he (1) for the last two hours (2) that he was going to stop (3) . He added that if I had arrived ten minutes later, I (4) at home. When I mentioned that the house looked quite (5) , he said that the woman (6) usually cleaned it had been sick for some time and (7) for over a week. When I asked him (8) he did not do it himself, he said that he (9) to do so if Mrs. Jones did not come the (10) day.

[A] and [B] but [C] so

若a（x^my⁴）³÷（3x²yⁿ）²=2x⁵y⁴，则（　　）

A．a=6，m=5，n=0

B．a=18，m=3，n=0

C．a=18，m=3，n=1

D．a=18，m=3，n=4

广播电台是通过______传递信息的；江汉人民广播电台的频率是750kHz，它的波长为______ m．

王强是七年级的一名学生，他觉得读书太辛苦，再说有的人没有读书也照样挣大钱，所以他打算辍学去打工。假如你知道了他的这个念头，你打算怎样说服他放弃这个想法安下心来好好学习？

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某成人每日摄入总能量达到需要，碳水化合物占总热能的30%，脂肪占 40%，蛋白质30%，为了达到平衡膳食的要求，应提高摄入的食物的种类是

A．谷类
B．肉类
C．蛋类
D．蔬菜
E．水果