下列可用于检测细菌的方法有（）
A.生化反应
B.噬菌体分型
C.多聚酶链反应
D.气液相色谱法
E.红细胞吸附试验
参考答案：A, B, C, D
— _______ no ad during TV plays.
—Great move! I cannot tolerate those annoying ads appearing every several minutes.
A．There is said to have
B．It is said to have
C．There is said to be
D．It is said to be
弹簧管压力表中的扁曲空心弹簧管一端焊接空心的表接头，另一端与（）相连。
A.连杆机构
B.连杆机构和指针
C.指针
D.显示器
