【单选题】How careless he was! He ______ a lot of important ideas while reading.
【判断题】在保付代理业务中,保理商承购的由出口商所开具的汇票是有追索权的。
【单选题】He is a man of ______ ideas and he often makes a careful plan ______. [ ]
A.
advanced; before advance
B.
advancing ; in advance
D.
advancing: in advance of
【单选题】(Choose words or phrases closest in meaning.) You should cheer up and not let your parents down .
A.
make your parents happy
B.
make your parents excited
C.
make your parents angry
D.
make your parents disappointed
【多选题】Choose some words good for your health.
B.
under stress for a long time.
【单选题】根据国际生化学委员会的规定,酶的一个国目际单位是指
A.
最适条件下,每小时催化生成lμmol产物的酶量
B.
25℃下,其他为最适条件,每分钟催化生成lμmol产物的酶量
C.
在特定条件下,每分钟催化lμmol底物产生变化所需的酶量
D.
37℃下,每分钟催化生成lμmol产物的酶量
E.
30℃下,每小时催化生成lμmol产物的酶量