选择题。一杯糖水50克,含糖5克,这杯糖水的含糖率是()。A,5÷ 50* 100\�B,50\div 5\times 100\�C,$5\div \left ( {50
得数比50小的算式有( ). A: 90-6\times3 B: 66+35\div7 C: 20\div5+21 D: 100-81\div9 相关知识点: 试题来源: 解析C 正确率: 0% A 选项: 90-6\times3=90-18=72;72>50,即这道题的结果大于50,故\text{A}错误; B 选项:
最后,他们被淹没用 0.1%氯化汞用颤抖的连续 5 分钟,然后用无菌蒸馏水冲洗几次。种子涂抹干燥无菌滤纸上,撒在瓶含 50 毫升的 MS 培养基中含有 3%蔗糖 (村蕃、 斯库格 1962年)。介质的 ph 值调整到与之前的 0.25%培养基 (西格玛) 加入 1 N KOH 5.8 和蒸压 20 分钟 121 ° c 种子萌发温度为 25 ± 1...
since.From 2005 to 2017,she completed the Beijing Marathon thirteen times,and this year she set a new record,becoming the(5) Cperson to ever complete the 168-kilomeler Liaoning marathon. "This lady is as old as my grandmother,how can she run so fast?That's ...
( ) 5. Which sentence is NOT true? A. 90% students do homework every day. B. 50% students eat junk food three or four times a week. C. All students do homework every day. D. Only 5% students exercise once a week. . 答案 答案: 1.A;2.B;3.D...
curious C. nucleus D. June( ) 2. A. north B. horse C. short D. word( ) 3. A. fear B. bear C. near D. hear( ) 4. A. Asia B. Russia C. India D. special( ) 5. A. news B. flew C. drew D. grewXXVI. 词汇与语法知识(50分)从每小题的四个选项中...