下列句子中加点成语使用不恰当的一句是…………………………………（ 　） A．这时

阅读理解.阅读下面短文， 完成每个句子。

     One of world's most important foods

     Ji Wei's family grows rice on their farm .Rice is one of the world's most important foods. More than half of the people in the world eat rice with every meal. In some languages in Asia , the same  word  means  eat

and eat rice.

     Like wheat and corn , rice is a kind of grass. Rice likes to grow in warm,  wet places.   China and India grow the most rice. Together , China and India grow more than half of the rice in the world.

1. Rice is one of the word's most_____ foods.

2. More than ______ of the people in the world eat rice _____ _____ _____ .

3. In some _____ in _____ , the same word means _____ and ____ ____ .

4. Rice is kind of _____ .

5. _____ and ______ are also a kind of ______ .

6. Together, China and ______ grow more than _____ _____ the rice ___ ___ ___.

X、Y、Z三种金属，X、Y作原电池的电极，稀硫酸为原电池的电解质溶液时，X是负极；把Y放在Z的硝酸盐溶液中，Y表面有Z析出．X、Y、Z的活动性顺序是（　　）

A．X＞Y＞Z

B．Z＞Y＞X

C．X＞Z＞Y

D．Y＞X＞Z

可用阴阳互根互用来解释的是（）。

A.阳胜则阴病

B.阳病治阴

C.阴损及阳

D.重阴必阳

E.阴虚则阳亢

病人因突然畏寒、高热、头痛、严重感染就诊，诊断为粒细胞缺乏症，做骨髓检查显示粒细胞成熟受阻，血象中粒细胞应（）

A.<4.0×10⁹/L

B.<2.0×10⁹/L

C.<0.5×10⁹/L

D.持续<4.0×10⁹/L

E.<1.0×10⁹/L

突发事件管理结构中的执行系统的主要任务是什么？