下列物质的体积约为22.4L的是 [ ] A．标准状况下1mol H2O B．2

When you work long hours and Sundays are no longer a day to rest, feeling overworked can become the new normal. Take sportsmen as examples and do the same yourself, so you’ll know if you’re overworking.

Check your resting heart rate (率). Every day, before you get out of bed, take your pulse (脉搏). Usually your heart rate will stay within a few beats every minute. But when you’re overworked, the rate increases. If your heart rate is up in the morning, get a little more rest or sleep that night.

Check your emotions. Getting angry easily? If you can’t put your finger on a clear reason, there may be something wrong with your emotions. Hoping to change the condition won’t help. The only way out is a break.

Check your weight. If you lose or increase more than 1% of body weight from one day to the next, something is wrong. Maybe yesterday you were too busy and failed to notice you didn’t eat and drink enough. Or maybe you failed to notice that you were eating too much.

小题1:How many ways are mentioned to check if we’re overworking?

A．Two.

B．Three.

C．Four.

D．Five.小题2:When should we check our heart rate?

A．In the morning.

B．In the afternoon.

C．At noon.

D．At night.小题3:What is the best way to deal with the problem of overwork?

A．Doing more sports.

B．Drinking more water.

C．Having more rest.

D．Eating less food.

L型空压机气缸部件的润滑系统由（）等组成。

A、注油器

B、齿轮泵

C、油管

D、逆止阀

2008年浙江省合同外资约为（）。

A.156亿美元

B.154亿美元

C.178亿美元

D.189亿美元

仪表的准确度指的是基本误差的最大允许值。

下列物质属于碱性熔剂的是（）。

A.Al₂O₃

B.石英

C.白云石