在简支梁跨中，由静活载所引起的竖向挠度不应超过跨度的（）。A._爱下问搜题

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问题单项选择题

在简支梁跨中，由静活载所引起的竖向挠度不应超过跨度的（）。

A.1/600

B.1/700

C.1/800

答案

参考答案：C

完形填空

完形填空。

Han Meimei 1 a Chinese girl . 2 this picture 3 her family 4 home .We can see her father, 5
mother, her brother 6 her (她).They 7 a cat. It’s 8 English cat .Can you see 9 cat? 10 you know
its mame? It is Mimi.

( )1. A. am
( )2. A. Look
( )3. A. at
( )4. A. in
( )5. A. his
( )6. A. and
( )7. A. see
( )8. A. a
( )9. A. a
( )10.A. Do

B. be
B. Look at
B. on
B. /
B. her
B. but
B. know
B. an
B. /
B. Are

C. is
C. see
C. of
C. to
C. their
C. or
C. have
C. /
C. the
C. Is

D. are
D. Read
D. in
D. at
D. Lily
D. too
D. spell
D. the
D. they
D. /

问答题

常温下，将40克7%的NaCl溶液和60克12%的NaCl溶液混合，得到密度为1.17g/cm的混合溶液，计算：

（1）该混合溶液中溶质的质量分数？

（2）该混合溶液中溶质的物质的量浓度？