水泥抗压强度试验，以一组三个试件得到的6个抗压强度算术平均值为试验结果。如6个测定值中有一个超出6个平均值的±15%，舍去该结果，而以剩下5个测定值的平均值作为结果，如5个测定值中再有超过5个平均值±15%的，则该次试验结果作废。()
查看答案
听力原文：M: Hi, Susan. I hear that you walk all the way to the office these days.
W: Yes. I have found great pleasure in walking. That' s the type of exercise I enjoy very much.
Why does the woman walk all the way to the office？
A. She takes it as a kind of exercise.
B. She wants to save money.
C. She loves doing anything that is new.
D. Her office isn't very far.
在下列检查中哪一项不会在此病患儿出现
A. 末梢血淋巴细胞＜1.2×109/L
B. 植物血凝素试验阴性
C. 胸部X线检查胸腺发育不良
D. 结核菌素试验阴性
E. 血清抗体水平很低或缺如
根据牙松动的方向确定Ⅱ度牙松动是
A. 颊舌向松动
B. 近、远中向松动
C. 垂直向松动
D. 颊舌向和近、远中向松动
E. 颊舌向、近远中向和垂直向松动
微信支付 
支付宝支付