以16m/s的速度水平抛出一石子,石子落地时速度方向与抛出时速度方向成37°,不

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问题:

以16m/s的速度水平抛出一石子,石子落地时速度方向与抛出时速度方向成37°,不计空气阻力,那么石子落地时的速度=______m/s,石子抛出点与落地点的高度差=______m(g=10m/s2

考点:平抛运动
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It was a Saturday afternoon. Mr. Green was reading a newspaper. Suddenly he heard his wife 16    in the next room. He hurried to her and asked, "What happened to you. my dear?”
“Oh, dear!” his wifecried out, "My head hurts!  17    a doctor. Hurry up!”Their two children were both  18   at that moment and something was wrong with the telephone. Mr. Green 19    go to a hospital himself. Bad luck! All the hospitals in the town were 20  that day. Mr. Green didn't know   21   . Just then his friend, Mr. Brown, saw him and asked. "What is   22 ?"
Mr. Green told him everything. The man .said. "Why not turn to  23   ? He can help you."
Mr. Green remembered his friend, Mr. Black was a good doctor. He hurried to Mr. Black's.
When he got there, Mr. and Mr. Black were having their 24 meal . The doctor asked Mr. Green to drink with him.He was happy and sat  25. After that they began to chat. And when Mrs. Black asked, “How is you wife?”“She is fine, thanks…” Mr. Green stopped at once — he remembered his wife was waiting for a doctor at home. ^
小题1:
A.cryingB.laughingC.whisperingD.singing
小题2:
A.Look for B.Wait forC.Send for D.Ask for
小题3:
A.inB.out C.up D.down
小题4:
A.should B.could C.had to D.was able lo
小题5:
A.expensiveB.openC.free D.closed
小题6:
A.when to go B.how to doC.where to goD.what to deal with
小题7:
A.the matter B.the wrongC.troubleD.problem
小题8:
A.Mr. Brown B.Mr. BlackC.Mr. GreenD.Mrs. Green
小题9:
A.lunchB.supperC.morningD.evening
小题10:
A.in bedB.on floorC.at the tableD.at home
题型:填空题

小红说我的钱的小数点向左移动一位是0.78元,小华说我的零花钱比小红多2元.小红、小华各有多少钱?

题型:填空题

向MgCl2和AlCl3­的混合溶液中加入氢氧化钠溶液,所得沉淀的物质的量(n)与加入氢氧化钠溶液的体积(V)关系如下图所示。

则下列说法正确的是(   )

A.a、c两点沉淀物成份相同,d、e两点沉淀物成份相同

B. b—c段与c—d段溶液中阴离子的物质的量相等

C.在d点,向溶液中加入盐酸,沉淀量将减少

D.在反应过程中,各状态点溶液的pH大小顺序是:e > d > c > a > b

题型:填空题

关于桡动脉与足背动脉测压,下述哪项错误()

A.桡动脉测压方便,成功率高

B.收缩压桡动脉高于足背动脉

C.高血压时二者血压的差值增大

D.低血压时二者的血压较接近

E.足背动脉压力波切迹通常不明显

题型:填空题

"三人行,必有我师",说明了()的道理。

A、执政为民

B、团结和睦

C、互相学习

D、助人为乐

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