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【简答题】
单词拼写 : 根据首字母或汉语提示写出下列单词。 1. These children love to play t__________ on their English teacher. 2. She is ___________ (擦)the table. 3. It may take a few weeks for you to build up your __________ (体力)again. 4. Don't be particular about food. A b__________ diet is very important for health. 5. Not spitting was __________ (允许)in public. 6.She __________ (尖叫)when she saw a snake approaching her. 7. For Chinese people, Deng Xiaoping T__________ is very important. 8. It __________ (迷惑)me a lot how they could do it without modern technology. 9. The centre of our city is moving _____________. () 10.The __________ (市区的)stores are usually busy during Christmas times.
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参考答案:
举一反三
【简答题】氨气极易溶于水,在0℃、1.01×10 5 帕时,测得其饱和溶液的物质的量浓度为18.4mol/L,该溶液的密度为0.9g/cm 3 . (1)氨水饱和溶液的质量分数是______ (2)0℃、1.01×10 5 帕时,1体积水中最多可溶解______体积的氨气?
【单选题】What does “denotation” mean?
A.
Denotation means the dictionary meaning.
B.
Denotation means the overtones of the meaning.
C.
Denotation means something beyond the dictionary meaning.
D.
Denotation consists of cultural, political, and literary meanings.
【单选题】声波有两个重要的参数:振幅和()
A.
周期
B.
频率
C.
响度
D.
共振
【单选题】在标准状况下672L的NH 3 气体溶于1L水中,配成密度为0.98g/mL、溶质的质量分数为33.77%的稀氨水溶液,该溶液的物质的量浓度约为(  )
A.
16.36mol?L -1
B.
18.09mol?L -1
C.
0.1947mol?L -1
D.
19.47mol?L -1
【简答题】餐前准备工作包括环境准备、服装发型、个人卫生及物品准备、心理准备和()
【单选题】声波有两个重要的参数:振幅和()
A.
频率
B.
初相
C.
响度
D.
共振
【单选题】What is denotation of a word?definition of a word. explicit meaning of a word or phrase.
A.
Denotation is the dictionary
B.
It is basically the literal meaning.
C.
It is the direct or
D.
All of them.
【单选题】标准状况下VL氨气溶解在1L水中(水的密度近似为1g/ml),所得溶液的密度为ρ g/ml,质量分数为w,物质浓度为c mol/L,则下列关系中不正确的是 [     ]
A.
ρ=(17V+22400)/(22.4+22.4V)
B.
W=17c/(1000ρ)
C.
W=17V/(17V+22400)
D.
C=1000V ρ/(17V+22400)
【单选题】在标准状况下,将 a L NH 3 完全溶于水得到 V mL氨水,溶液的密度为 ρ g/cm 3 ,溶质的质量分数为ω,溶质的物质的量浓度为 c mol/L。下列叙述中正确的是
A.
ω=35a/(22.4Vρ)
B.
c =a/(22.4V)mol/L
C.
等浓度等体积的上述氨水和氢氧化钠溶液分别与等体积等浓度的稀盐酸反应,两者放出的热量相等
D.
在氨水中存在分子间作用力、氢键、共价键
【单选题】早餐餐前环境准备包括()台布铺放标准、清洁卫生。
A.
摆台标准
B.
餐台、餐椅摆放整齐无坏损
C.
餐具摆放标准
D.
水杯摆放标准
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