问题
单项选择题
The two vessels underway may collide with（）,if they don’t take immediate measures.
A.one to another
B.one the other
C.each the other
D.each other
答案
参考答案：D
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The two vessels underway may collide with（）,if they don’t take immediate measures.
A.one to another
B.one the other
C.each the other
D.each other
参考答案：D
缺失，进行可摘局部义齿修复，设计为基牙的
活动义齿，基牙健康，可采用的卡环类型为（）