何谓“自转”现象？交流伺服电动机时怎样克服这一现象，使其当控制信号消失时能迅速停止？

跳汰机排料机构的作用是什么？

Life comes in a package, which includes love and hate, happiness and sorrow, failure and success, hope and despair. Life is a learning process. Experiences in life teach us new lessons and make us a better person. With each passing day we learn to handle various situations.

• Love and hate

Love plays a key role in our life. Love makes us feel wanted. In the early stage of our life， our parents shower us with unconditional love and care. They teach us about what is right and wrong, good and bad. 小题1: Only after we get married and have kids can we understand and become sensitive to others, feelings. On the contrary, hate can not solve any problems, but make things worse. Thus, we’d better hate less and love more.

•   Happiness and sorrow

Material happiness is short-lived, but happiness achieved by bringing a smile to others gives a certain level of fulfillment. 小题2:____ No mind is happy without peace. We realize the true worth of happiness when we are in sorrow. Sorrow is basically due to death of a loved one, failure or despair. But these things are temporary and will pass away anyhow.

•   Failure and success

Failure is the path to success. It helps us to touch the sky, teaches us to survive and shows us a specific way. Success brings in money, fame, pride and self-respect. 小题3:____ The only way to show our gratitude to God for giving success to us is by being modest, polite and respectful to the less fortunate ones.

•   Hope and despair

Hope is what keeps life going. Hope makes us dream and builds patience and confidence in us. Life teaches us not to despair even in the darkest hour because after every night there is a day. Nothing remains the same.

小题4:____

Life teaches us not to regret over yesterday, for it has passed and is beyond our control. Tomorrow is unknown , for it can either be bright or dull. 小题5:___

A． Every defeat is just a small part of victory.

B． Peace of mind is the main link to happiness.

C． But we always tend to take this for granted.

D． Happiness is always what we want to achieve.E.  It's important to keep our head on our shoulder.

F.  The alternative is to work hard today to enjoy a better tomorrow.

G.  We have only one choice — keep moving on with hope in life.

杨女士，30岁，哺乳期4个月，正接受滴虫性 * * 炎的治疗，前来询问避孕措施。全科医生应告知选择（）。

A.安全期

B.体外排精

C.使用避孕套

D.口服避孕药

E.放置宫内节育器

格列本脲最常见不良反应是（）

A.胃肠道反应

B.乳酸酸中毒

C.低血糖反应

D.白细胞减少

E.水肿

对于马赫配平以下哪种说法正确（）。

A.A/P衔接时才能工作

B.A/P衔接时不能工作

C.不管A/P是否衔接均能工作

D.只要FD接通就能工作