下列哪种方式不能达到减轻力的目的()。
A.减小面颊舌径宽度
B.加大面颊舌外展隙
C.加深面沟槽
D.锐利牙尖
E.减小面颊舌外展隙
参考答案:E
提出元素周期律并根据周期律编制第一个元素周期表的科学家是 [ ]
A. 道尔顿
B. 范德华
C. 门捷列夫
D. 阿伏加德罗
—What’s up? Could you tell me what’s ?
—Something is wrong with my MP4. I will get it after school.
A.happened, repair
B.be happened, repairing
C.happening, to repair
D.happening, repaired