水银气压表的安装高度应尽量与（）的高度相同。
A.观测场地面
B.气压传感器
参考答案：B
There is no doubt that students ________in their study if they more praise from their teachers.
A．will make progress; will get
B．make progress; get
C．will make progress; get
D．make progress; will get
染色体末端的（）在细胞衰老过程中，随着DNA复制而逐渐（）.
