双效吸收式冷水机组的溶液循环流程有串联流程、并联流程和串并联流程三种。

19世纪80年代，日本经济发生巨大变化的表现是①机器生产取代了工场手工业 ②政府兴办的企业全部转给了私人③垄断组织在政府的保护下产生④《大日本帝国宪法》的颁布

A．①②③

B．①③

C．③④

D．①②③④（ ）

引进浅冷装置（）故障会造成氨压缩机时开时停。

A.氨循环回路低压开关

B.电磁阀工作不正常

C.温度继电器断路

D.有不凝气存在

患者男，50岁。结喉正中肿痛2天，起病迅速，肿势散漫不聚，坚硬灼热疼痛，伴壮热口渴，吞咽困难。考虑诊断为（）

A.颈痈

B.流注

C.丹毒

D.有头疽

E.锁喉痈

用船吊吊卸重大件时，船舶初稳性高度最小的时刻为（）。

A．吊杆头的高度最大时

B．货物距基线的高度最大时

C．吊杆与船舶首尾线垂直时

D．吊杆与船舶首尾线平行时

用下列词组的正确形式完成句子。

1  .Li Hong is such a girl who can _______her attention her study for a whole class.

2. Yesterday a robber, who refused to give in, was _______and fired to death by the policeman.

3.  An old worker was found__________a painting of Tang Dynasty.

4.  On May Day, _________shoppers entered the supermarket,

5. She is a talented musician ___________a photographer.

6. When the earthquake happened,_________, about 150 students were having PE lessons on the

playground.

7. She looked through_________information for the report.

8.  __________to reach the mountain summit,they made preparations for everything.

9.  Practical experience, ____________,can give us more useful knowledge.

10. It is dangerous to_______the union.