1. wage, income, pay, salary, wages辨析
income:收入、收益、进款(统称);
pay:薪水,工资;最普通用语,特指海陆军人及其他在政府部门工作的人的薪水;
salary:薪水;指从事脑力劳动的劳动者,如事务员、记者、教师、牧师等的薪水;
wages:(复)工资;指劳动者的工资,通常指给予短期工作者的报酬;
fee:手续费,薪金;指付给律师、医师或其他专业人员的酬金、学费等。
8. fall behind落后于;拖欠
The illness caused him to fall behind the rest of the class.
He always falls behind when we’re going uphill.
Make sure not to fall behind with your rent, please.
7. take a risk/take risks冒险
We ought not to take risks.
You are taking a big risk driving so fast.
at risk处于危险之中;at the risk of冒……的危险
6. instruct vt.教;指导;指示
instruct sb. in sth.教导某人某事
instruct sb. to do sth.命令某人干某事
follow the instruction遵从指示
I am instructed to inform you that the minister is not willing to make a statement.
5.acquire vt.学到;获得acquisition n.获得;得到
The company has acquired shares in a rival business.
She acquired an American accent while living in New York.
acquire a habit of smoking养成抽烟的习惯
acpuire a bad reputation得到坏的名声
4. stick vt.使停止;阻塞;刺;伸出;粘贴
He stuck his fork into a big piece of meat.
Don’t stick your head out of the window of the car.
A nail stuck in the tyre of my car.
Our car got stuck in the mud.
stick to坚持stick out伸出……stick on贴住
3. anyway adv.无论如何;即使如此
I’m going anyway, no matter what you say.
It’s too late now, anyway(anyhow).
Anyway (Anyhow), you can try, even if there’s not much chance of success.
2.occupy vt.使忙碌;使从事;占有
The table is already occupied.
The company occupies the entire building.
He is occupied in repairing farm tools.
be occupied in doing sth./with sth=be busy doing sth./with sth.
occupy oneself in doing sth./with sth.忙于(做某事)
1.admit vt.承认;准许……进入(使用)vi.容许;承认
admit sb.(sth.)into/to sth.允许某人(物)进入
sb. be admitted to school (hospital)接受某人入学(院)
admit sth./doing sth./that clause承认……
27.(9分)已知Fe3+的氧化性大于Cu2+,据此性质,某工厂用FeCl3溶液腐蚀镀有铜的绝缘板生产印刷电路。用离子方程式表示其化学原理___________________。
某实验小组的同学对该厂生产印刷电路后所得的废液进行了分析:取50.00 mL废液,向其中加入0.64 g金属铜,金属铜全部溶解;又取50.00 mL 废液,向其中加入足量的AgNO3溶液,析出沉淀43.05 g。请回答以下问题:
(1)该厂生产后废液中所含金属离子有________________________;
(2)该厂原来使用的FeCl3溶液的物质的量浓度________________(反应前后溶液的体积变化忽略不计);
(3)若向500.00 mL废液中加入足量的稀硝酸,在标准状况下生成NO气体4.48 L,则原废液中各金属阳离子的物质的量浓度之比为__________________;
(4)另取500.00 mL废液,加入一定量铁屑,充分反应后有铜析出,则所得溶液中Fe2+的物质的量范围为 ________ ___________。
余杭高级中学2009学年第一学期高三第二次月考
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