横断面测量就是测出横断方面的地表()。
参考答案:起伏情况
Tom kept quiet about the accident ______ lose his job.
A.so not as to
B.so as not to
C.so as to not
D.not so as to
下列关于牙槽骨生物学特性的叙述,不正确的是()
A.可由于不断新生而影响牙齿发育
B.受到外界的压力,可表现为吸收
C.具有高度的可塑性
D.随牙齿的萌出而不断改建
E.较牙骨质更容易吸收