立井井筒检查孔孔深应当不小于井筒设计深度以下（）m。地质条件复杂时，应当增加检查孔数量。
A.20
B.30
C.40
D.50
参考答案：B
As the boy was weak in health, his doctor ________ him to take more exercise. [ ]
A. hoped
B. suggested
C. thought
D. advised
患者，女，56岁，农民，右足躖指指甲处红肿，跳痛10天，经口服抗生素后症状得到控制，这时不能用的方法是
A．紫外线疗法：亚红斑量B．红外线疗法C．微波疗法：微热量或温热量D．He-Ne激光照射疗法E．正压顺序循环疗法
