【单选题】团队成员可分为八种类型,其中监督者所具有的典型特征是:
【简答题】I will lock the door if you give me a key. I would lock the door if you _____ me a key. I would have locked the door if you _____ me a key.
【简答题】A: He left in _______ a hurry that he forgot to lock the door. B: He left ______ hurriedly that he forgot to lock the door.
【单选题】正确的实验基本操作技能是顺利进行化学实验的保证,下列操作错误的是
A.
检验溶液pH的操作是:将干燥的pH试纸置于表面皿上,用玻璃棒蘸取溶液,点在pH试纸的中部,与对应的标准比色卡进行比较
B.
制取乙酸乙酯时,将乙醇、乙酸依次加入浓硫酸中
C.
实验室通过蒸馏的方法制取蒸馏水时要加少量的碎瓷片,以防止溶液暴沸
D.
观察钾元素焰色反应的操作是:将铂丝放在稀盐酸中洗涤后,在酒精灯上灼烧至无色,然后蘸取固体氯化钾,置于酒精灯火焰上进行灼烧,透过蓝色钴玻璃进行观察
【单选题】Before leaving home, make sure to turn off the electricity, lock the door, ______ the windows open.