船舶交通工程中,一个水域中使用适当航速,是指()。
A、安全航速
B、兼顾安全和交通效率的航速
C、保持船舶有序航行的航速
D、以上都是
参考答案:B
A: 小题1:___________your summer holiday, Sam?
B: I plan to have a trip to Beijing小题2:_________________?
A: I haven’t decided, but I would like to visit the Yellow Mountains.
B: I 小题3:_____________last summer. It’s really a good place. I like it very much
A:My father has been there twice. He wants me to go there too.
B: I know that you小题4:________________. Can you tell me some famous places in Beijing?
A:Sure. There are many in Beijing, such as the Palace Museum, the Summer Palace and the Great Wall and so on.
B: 小题5:______________________to visit all these places?
A: At least a week, I think.
对于输卵管间质部妊娠,下列哪项不恰当()
A.一侧宫角突出
B.子宫与停经月份相符
C.子宫不对称
D.尿hCG(+)
E.破裂所致征象类似于子宫破裂