螺旋桨吸入流的特点是：（）.A.流速较快，范围较广，水流流线几乎相互平行 B.流速较

发布时间：2019-12-26 14:34 │ 来源：www.tikuol.com

题型：单项选择题

问题：

螺旋桨吸入流的特点是：（）.

A.流速较快，范围较广，水流流线几乎相互平行

B.流速较慢，范围较广，水流流线几乎相互平行

C.流速较快，范围较小，水流旋转剧烈

D.流速较慢，范围较小，水流旋转剧烈

考点：海船船员考试船舶管理(大副)船舶管理(大副)题库

题型：单项选择题

完形填空。

Eric had a very busy weekend. 1 Saturday morning, he cleaned his room. In the afternoon, he 2 his homework. It was 3 boring. On Saturday night, he 4 Chinese. His mother cooked fish for 5 . On Sunday morning, he 6 to the library and 7 a book about history. Then in the afternoon he 8 geography. On Sunday night he 9 an hour on the Internet and 10 a talk with his friend in China.

( )1. A. In
( )2. A. does
( )3. A. a little
( )4. A. practiced
( )5. A. he
( )6. A. goes
( )7. A. read
( )8. A. is studying
( )9. A. spend
( )10. A. had

B. On
B. is doing
B. Little
B. Said
B. His
B. Went
B. Readed
B. studies
B. Take
B. have

C. For
C. did
C. a few
C. told
C. her
C. is going
C. reads
C. studied
C. spent
C. give

D. At
D. died
D. few
D. spoke
D. him
D. /
D. looked
D. had studied
D. took
D. gave

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0.4与0.40大小相等，意义相同．______．（判断对错）

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维生素A在婴幼儿生长发育中的作用不包括（）。

A.促进机体生长

B.促进肠道对钙、磷的吸收

C.促进骨骼发育

D.促进生殖、视觉发育

E.提高抗感染能力

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皮肤的最外层是：

A．表皮

B．真皮

C．皮下组织

D．基底层

E．透明层

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赫尔巴特关于道德训练的观点。

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