幽门螺杆菌主要是通过消化道途径传播的。
参考答案:对
_What did he say on the phone just now
_ He suggested that we ______ a good rest.
A.would have
B.have
C.had
D.had had
“井深”记载自地面至井底的距离,以()计。
A、10m
B、m
C、dm
D、cm