You ____ eat too much junk food. [ ]
A. must
B. shouldn't
C. haven't to
D. should
答案:B
电机储存的库房一般相对湿度为()。
A.60%
B.70%
C.80%
男性患者,28岁,1年前诊断为系统性硬化症,近2个月经常于饭后觉腹胀、上腹部及后胸部烧灼痛,同时伴吞咽困难,考虑该患者出现哪个脏器受累
A.食管
B.胃
C.心
D.肾
E.甲状腺