用高率放电计检查汽车铅蓄电池的放电程度,当蓄电池放电达50%时,其单格电压应在()范围内。
A.1.7~1.8
B.1.5~1.6
C.1.4~1.5
D.1.3~1.4
参考答案:B
骨软骨瘤的治疗宜采取()。
A.早期发现,早期手术
B.肿瘤段切除
C.若肿瘤大,生长快,切除范围应包括肿瘤基底四周部分正常骨组织
D.刮除病灶,自体骨植骨术
E.切除后人工关节置换术
The prices of new houses in our city have been _______ than before, but they _______ well at present. [ ]
A. higher, still sell
B. lower, are not still sold
C. higher, don't sell
D. cheaper, are not still sold