简单悬挂的平腕臂要水平安装，其端部允许抬高不超过（）。
A．50mm
B．60mm
C．80mm
D．100mm
参考答案：D
根据图片提示完成下列句子。
1. —Where's your pen pal from?—He is from _______.
2. Does his aunt go to _______?
3. Where can you see the sightseeing in the picture?_______ in China.
4. If you visit _______, you can see Tian'an men Square.
5. Look at the flag, Which _______ is it? It is United States.
妊娠合并心脏病中常见的类型
A．先天性心脏病B．风湿性心脏病C．妊高征心脏病D．贫血性心脏病E．高血压心脏病
1. —Where's your pen pal from?—He is from _______. 
2. Does his aunt go to _______? 
3. Where can you see the sightseeing in the picture?_______ in China. 
4. If you visit _______, you can see Tian'an men Square. 
5. Look at the flag, Which _______ is it? It is United States.