喉癌放射治疗中最常见的并发症是()A．干、湿性皮肤反应 B．喉水肿 C．进食梗阻 D

与610°角终边相同的角表示为______．

如果显微镜的镜头上有一些灰尘，下列哪种方法除尘最好（　　）

A．把手洗净，用手指拭掉灰尘

B．放到清水中洗净，再晾干

C．对着镜头呵一口气，再用衣服角擦

D．用擦镜纸沿一个方向擦

What does the speaker say about the artists in the United States during the Great Depression().

A.Many artists lost faith in the value of art.

B.Many artists were forced to take jobs in other fields.

C.Many artists moved away from large cities.

D.Many artists in the United States moved to other countries.

橡胶的“Baras effect”

臀位 * * 分娩，胎儿脐部娩出后应结束分娩的时间是

A．8分钟以内
B．9分钟以内
C．10分钟以内
D．12分钟以内
E．15分钟以内