孕妇血容量达高峰的时间是（）.
A.孕12～19周
B.孕20～28周
C.孕28～30周
D.孕32～34周
E.孕38～40周
参考答案：D
I’d appreciate ____ if you would like to teach me how to use the computer.
A．that
B．it
C．this
D．you
冠心病西医常见的临床分型有（）
A.隐匿型冠心病
B.心绞痛型冠心病
C.心肌梗死型冠心病
D.心力衰竭型和猝死型
I’d appreciate ____ if you would like to teach me how to use the computer.