常见的染色体病有()
A.21-三体综会征
B.18-三体综合征
C.猫叫综合征
D.13-三体综合征
E.脆性X综合征
参考答案:A, B, C, D, E
Could you please recommend a garage ______ I can have my car ______.
A.nearby where; repaired
B.in which; repairing
C.around which; be repaired
D.where; to repair
重铬酸盐法测定化学需氧量适用于含COD值大于()的水样。
A.30mg/L
B.20mg/L
C.10mg/L
D.1mg/L