BCWS是10000，BCWP是7000，ACWP是5000，成本偏差为：（） A.

用括号中所给单词的正确形式填空。

1. Father's Day is on the _____ (three) Sunday of June.

2. The population in China is much _____ (large) than that in Australia.

3. I haven't seen my grandma for a long time. I' m looking forward to _____ (visit) her soon.

4. Peter and Simon enjoyed _____ (they) at the English party last night.

5. We were discussing the details of the charity show when the teacher _____ (come) into the classroom.

6. Tom never does his homework as_____ (good) as his cousin. He makes a lot of  mistakes.

7. At the exhibition, the little boy's _____ (invent) attracted many IT engineers.

X、Y、Z是3种短周期元素，其中X、Y位于同一族，Y、Z处于同一周期。X原子的最外层电子数是其电子层数的3倍。Z原子的核外电子数比Y原子少1。下列说法正确的是 [ ]

A．元素非金属性由弱到强的顺序为Z<Y<X

B．Y元素最高价氧化物对应水化物的化学式可表示为H₃YO₄

C．由于氢键的影响，3种元素的气态氢化物中X的气态氢化物最稳定

D．原子半径由小到大的顺序为Z<Y<X

最常用的纤维素类薄膜衣料是（）.

A、HPMC

B、HPC

C、PVP

D、丙烯酸树脂IV号

战国以后，我国主要的土地制度是（）。

A.屯田制

B.井田制

C.均田制

D.土地私有制

患儿，男，7岁。8月份外出旅游时发病。表现高热、惊厥3次急诊入院。体温39.5℃，面色苍白，四肢厥冷，意识模糊。

本病最严重的临床表现是（）

A.高热

B.反复惊厥

C.黏液脓血便

D.感染性休克

E.频繁吐泻