若Z=-i2+i（i是虚数单位），则复平面内表示复数.z的点在（ ） A．第一象限

A young man went to the local expert(专家) on gems and said he wanted to become a gemologist(珠宝家). The expert turned him down because he feared the youth would not have the patience to learn. The young man asked for a chance. Finally, the expert told the youth, "Be here tomorrow."

The next morning the expert put a jade(玉) stone in the youth's hand and told him to hold it. The expert then went about his work, cutting, weighing and setting gems. The boy sat quietly and waited.

The following morning the expert again put the jade stone in the youth's hand and told him to hold it. On the third, fourth and fifth days, the expert asked the young man to do the same thing. On the sixth day, the youth held the jade stone but he could no longer stand(忍受) the silence. "Master, when am I going to learn something?" he asked.

"You will learn." the expert said and went about his business.

Several more days went by and the youth almost lost his patience. But one morning as the master put the stone in the youth's hand, the young man said without looking at his hand, "This is not the same jade stone!"

"You have begun to learn." said the master.

Practice makes perfect. The experience we learned from practice teaches us and develops our abilities. Experience is the best teacher. Even the most successful person had no absolute confidence once. It is experience that gives people confidence. The truth is: if you do the work and gain the experience, you'll have more confidence because you'll actually know what you're doing.

小题1:The phrase "turned ... down" probably means _______.

A．refused

B．accepted

C．forgave

D．doubted小题2:The expert let the young man hold the jade stone for so many days because he wanted to see if the young man was _______.

A．brave

B．patient

C．clever

D．honest小题3:What may be the best title for this passage?

A．An Experienced Gemologist

B．Experience, the Best Teacher

C．Experience of a Young Man

D．A Confident Teacher

—Could you tell me something    about the boy who helped you just now?  

—Sorry ,l know nothing about him. We are   _______    [ ]

A. friends                  

B. neighbors  

C. classmates              

D. strangers

二尖瓣位于什么部位

A．左右心室之间
B．右心室与主动脉之间
C．左侧房室之间
D．左心室与主动脉之间
E．右侧房室之间

发生与船舶有关的保安事件，船舶应立即向公司保安员和（）的联系点提交一份报告。

①船旗国；

②港口国；

③沿海国；

④缔约国。

A.①-④

B.①-③

C.①②

日常监测与预警不包括下列哪些工作（）

A.确定监测范围

B.提供或建立监测手段与工具

C.评估事件级别

D.记录并报告监测数据和信息