压力容器作业人员证每（）复审一次。A.2年 B.4年 C.6年 D.每年_爱下问搜题

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问题单项选择题

压力容器作业人员证每（）复审一次。

A.2年

B.4年

C.6年

D.每年

答案

参考答案：A

完形填空

完形填空。
     Mary Black   1   a girl.   2   is a student (学生).   3   is   4   family name and Mary is her   5    name.
Her   6    number is 7094328 and her ID card    7    a student. Her mother     8   a worker (工人). She
and   9   mother  10   the same.

( )1.  A. am
( )2.  A. Her
( )3.  A. Mary
( )4.  A. her
( )5.  A. family
( )6.  A. phone
( )7.  A. is
( )8.  A. are
( )9.  A. her
( )10. A. look

B. are
B. She
B. Black
B. she
B. last
B. ID
B. am
B. is
B. Her
B. Looks

C. is
C. He
C. Mary Black
C. she's
C. name
C. bus
C. are
C. am
C. his
C. are

D. aren't
D. I
D. Wang
D. his
D. first
D. card
D. am not
D. aren't
D. His
D. is

单项选择题

光感受器间维生素A结合蛋白可以在细胞间传递维生素A，它主要存在于（）

A.视网膜感光细胞间

B.视网膜色素上皮细胞之间

C.视网膜感光细胞与色素上皮细胞之间

D.视网膜血管内皮之间

E.以上细胞之间均存在