下列何药是通过保护动脉内皮而起到抗动脉粥样硬化作用A．吉非贝齐 B．氯贝丁酯 C．普

读短文，判断对(√)错(×)。

      Hello! My family has four members. My father is a doctor. He likes rice and vegetables. My mother is a

teacher. She likes noodles and vegetables. My baby sister is 3 years old. She likes milk. I am 11 years old. I am

a student. I love my family.

( ) 1. My mother is a teacher.

( ) 2. My father likes rice and vegetables.

( ) 3. My sister is 3.

( ) 4. I am 12.

( ) 5. My family has 4 members.

一列简谐波，从某时起当t=3s时刻的波形如图甲所示，图乙为质点P₁的振动图象，则由图可知（　　）

A．该波向x轴正向传播

B．该波的传播速度为6m/s

C．t=2s时，质点P₂处于平衡位置

D．给波频率为4Hz

下列不属于发包人义务的是( )。

A．组织承包人和设计单位进行图纸会审和设计交底

B．办理土地征用、拆迁补偿、平整施工场地等工作

C．保证施工场地清洁符合环境卫生管理的有关规定

D．开通施工场地与城乡公共道路的通道

下列合同所产生的债权可以适用留置权的是( )。

A．买卖合同

B．租赁合同

C．运输合同

D．借款合同

静息电位的实测值同K⁺平衡电位的理论值相比较(绝对值)

A．前者小
B．两者相等
C．前者约大5%
D．前者约大10%