小王的身高是165cm,体重是40kg,则他的标准体重指数(),属于()。
A.<-10%;瘦弱
B.<-20%;重度瘦弱
C.±10%;正常
D.>10%;超重
参考答案:B
X线片上,牙槽嵴高度应在()
A.牙颈缩窄处
B.牙颈缩窄处下1mm
C.釉牙骨质界处
D.釉牙骨质界下1mm
E.冠根交界部
Rather than focus on explanation of grammatical rules in classroom teaching, the teacher of an Oral Approach class must encourage direct and ______ use of the target language in the classroom.