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【简答题】
It is not a good idea for children to have to work hard. Children should study in school as hard as they can. They should not have to do heavy work with their bodies. When parents or others force(强迫)their children to work hard, the results are never good. Many may be very bad. If a farmer makes his son work like a man, he may easily learn to hate farming. Children sometimes do too much in gardens, in shops, or even in their own homes. They soon begin to hate such work with a force, because that can destroy their happiness. But there may be a worse loss, child’s love for its parents. The feeling may become something different. When that happens, the old kind of love never returns. 小题1:It is not a good idea for _______to have to work hard. A.men B.women C.children D.boys 小题2:Children should study in school _______. A.hard B.easy C.happy D.early 小题3:Children should not have to do _______work with their bodies. A.easy B.good C.heavily D.heavy 小题4:The writer thinks children should study and play _______. A.hard B.happily C.heavily D.happy 小题5:The writer thinks children’s parents or others don’t force their _______to work hard. A.sisters B.brothers C.children D.uncles
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举一反三
【单选题】下列除哪项外均具有防晒作用
A.
表皮生长因子
B.
超氧化物歧化酶
C.
弹性蛋白
D.
金属硫蛋白
E.
核酸
【单选题】砌体填充墙与承重主体结构问的空隙部位施工,应在填充墙砌筑( )d后进行。
A.
5
B.
7
C.
14
D.
21
【单选题】判断溶液的酸碱性有多种方法。下列溶液中,一定呈碱性的是 [     ]
A.
能够使甲基橙呈现黄色
B.
溶液的pH>7
C.
溶液中:c(H + ) -)
D.
溶液中:c(H + )>1×10 -7 mol·L -1
【单选题】填充墙与承重主体结构的空隙部位施工,应在填充墙砌筑( )后进行。
A.
7d
B.
14d
C.
21d
D.
28d
【单选题】在氯化钠的提纯实验中,蒸发前将溶液的pH调至酸性的目的是
A.
利用Cl-离子的同离子效应,使NaCl的解离度降低,更易结晶
B.
防止其他可溶性杂质在蒸发的过程中水解,影响NaCl产品的纯度
C.
除去溶液中多余的OH-和CO32-离子
D.
抑制NaCl在蒸发过程中的水解
【单选题】下列说法正确韵是 [     ]
A.
溶液的pH越小,表明溶液中含有的H + 越多
B.
由0.1 mol·L -1 BOH溶液的pH =10,可推知BOH溶液中的电离方程式为BOH=B + +OH -
C.
0.1 mol·L -1 醋酸的pH为a,0.01 mol·L -1 醋酸的pH为b,则a+1>b
D.
已知酸性:HF> CH 3 COOH,pH相等的NaF与CH 3 COOK溶液中[c(Na + )-c(F - )]+)-c(CH 3 COO - )]
【多选题】微机的外部设备有:( )
A.
CPU
B.
打印机
C.
扫描仪
D.
读卡机
【单选题】下列说法正确的是
A.
溶液的PH值越小,表明溶液中含有的H + 的数目越多
B.
由0.1 mol·L -1 一元碱BOH溶液的pH = 10,可推知BOH溶液中存在关系BOH→B + + OH -
C.
0.1 mol·L -1 的醋酸PH为a,0.01 mol·L -1 的醋酸PH值为b,则a+1>b
D.
已知酸性HF〉HA C ,pH相等的NaF与 KA C 溶液中,[c(Na + )-c(F - ) < c(K + )-c(A C - )]
【简答题】填充墙与承重主体结构间的空隙部位施工,应在填充墙砌筑( )d后进行。
【单选题】填充墙砌体砌筑,应待承重主体结构检验批验收合格后进行。填充墙与承重主体结构间的空隙部位施工,应在填充墙砌筑()后进行。
A.
7d
B.
14d
C.
28d
D.
36d
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