20世纪上半叶，发生了以（）为核心的物理学革命，加上其后的宇宙大爆炸模型、DNA双螺

During our two months on the road, Bennett and I had a really (1) experience with a good, honest (2) and some helpful mechanics.

We were driving east on Highway 10 when our "chick engine" light came on. We limped of a(n) (3) into Las Cruces. We had a real car (4) Bennett nursed the ear into a local garage. By this time the car was missing so (5) it was shaking all over. This was the (6) time to arrive at a garage—late Friday afternoon. Service adviser Scott was busy (7) paper work and customers as we (8) our problems. (9) he was already "ten cars behind", he told us to pull the car into the garage.

Lincoln, who we later (10) was one of the two motor technicians, took (11) of our car repairing. He and Scott and some other mechanics stayed several hours after closing, (12) the car.

Early the next morning (the shop was officially closed on Saturdays), Lincoln finally located the (13) and fixed it easily within only (14)

Later Scott (15) out to us that it was our attitude that helped. "You didn’t come into the place demanding this or that. You showed an (16) of our problems on a busy Friday afternoon. Customer’s attitude means a lot. " He was right in some way, customers should show (17) and understanding to people who (18) them. (19) people were extremely busy, they found way to at least try and help when they are met with politeness.

The pleasant experience I had shows that (20) for other people can always help.

16（）

A.understanding 

B.ignorance 

C.appreciation 

D.awareness

常温下最难与氢气发生反应的是（　　）

A．氮气

B．氯气

C．氟气

D．氧气

心悸不安，心痛时作，唇甲青紫，舌质紫暗，脉涩，选用何方治疗最佳

A．血府逐瘀汤
B．桃仁红花煎
C．丹参饮
D．桃红四物汤
E．通幽汤

跃层建筑共用的室内楼梯应按( )计算。

A．水平投影面积

B．上一层的自然层

C．自然层

D．一层

企业混合性投资业务是（）。

A.指兼具资产和债权双重特性的投资业务

B.指兼具权益和债权双重特性的投资业务

C.指兼具权益和负债双重特性的投资业务

D.指兼具资产和负债双重特性的投资业务