变形缝一般做成企口缝，在缝的两侧，墙厚的中央埋置止水带，并在缝内堵塞嵌缝材料。( )
参考答案：错
—Who's Martin Robinson?
—He's a famous doctor who has a lot of experience of teenagers [ ]
A.deal with
B.to deal with
C.dealing with
D.dealed with
老年人一次持续锻炼时间一般不要超过（）小时。
A.0.5
B.1
C.1.5
D.2
