The cake looks ______ and it tastes even _____.
A、well; good
B、nice; better
C、good; worse
D、better; best

单项选择题It’s dangerous to swim in a ________ river.A、roughB、roughingC、calmD、roughed

单项选择题I wonder ____ he can get it done in such a short time.A、whenB、howC、whereD、where

单项选择题Neither he nor I__from Japan, that is, neither of us_Japanese.A、is; areB、am; are am; isA、are; is

单项选择题肿瘤组织局部呈现酸性(pH大约6.0)的主要原因是()。A、肿瘤细胞缺血缺氧，糖酵解增强，乳酸生成过多，导致局部呈酸性环境B、以上都不是C、肿瘤细胞从血液中摄取酸性物质，以便自身的生长增殖，导致局部呈酸性环境D、肿瘤细胞脂肪酸合成增多，导致局部呈酸性环境

单项选择题通过凯氏定氮法测定某一溶液中的含氮量为6.7%，那么该溶液中蛋白质的百分含量为()。A、41.9%B、127.3%C、67.0%D、54.3%