根据Stokes定律，混悬微粒沉降速度与下列哪一个因素成正比（） A.混悬微粒的半径

Sophie is a middle school student. Her mother is a dentist and her father is a writer. Sophie wants to be a cook. Sophie went to take part in（参加） a cake（蛋糕） making competition yesterday. 

Everyone began to make a cake. But Sophie hadn’t decided what kind of cake to make.

There was only half an hour left. Sophie had not even begun. So she began to panic (恐慌). Then she got an idea. She ran out and came to a cake shop. She gave fifty dollars to the shop keeper and said, “Please give me a chocolate cake.”

Then Sophie came back and put the chocolate cake on the table. But a little boy saw her do that.

When the judges (裁判员) were just about to taste Sophie’s cake, the little boy said to the judges, “Please don’t taste her cake. She didn’t make it and she bought it from a cake shop.”

The judges were angry and said, “That was terrible, Sophie.”

From that day on, Sophie never cheated.

小题1: Sophie wants to be a 　　　.

A．teacher

B．writer

C．cook

D．dentist小题2: Sophie began to panic because 　　　.

A．she was too tired

B．she didn’t begin to make her cake

C．she didn’t have money

D．her cake tasted bad小题3:Sophie spent 　　　 on the chocolate cake.

A．$5

B．$10

C．$15

D．$50小题4:The underlined word “cheat” means “　　　” in Chinese.

A．作弊

B．前进

C．承诺

D．解决

It has been proved ___ eating vegetables in childhood helps to protect you against serious illnesses in later life.

A．if

B．because

C．when

D．that

生化，承载，受纳属于( )

A．五行中木的特性
B．五行中火的特性
C．五行中土的特性
D．五行中金的特性
E．五行中水的特性

天津社保卡有效期限为多久？

早期妊娠最可靠的诊断依据是

A．基础体温于停经后高温相持续不降
B．妊娠试验阳性
C．海格征阳性
D．B超能见到有节律的胎心搏动
E．黄体酮试验