如图脐带血管有3条,A是______,B是______。血管周围胶样结缔组织如图中C称为______。
材料:
“光合作用”一节内容抽象,过程复杂。在讲解光反应、暗反应各自的条件、场所、物质变化、能量变化以及两者之间的联系等内容时,学生很难对整个过程有比较深的理解,这时教师为学生出示习题,以下为测验题:
图中表示光合作用的过程,据图回答:
(1)A过程表示________,B过程表示________。
(2)a物质是________,b物质是________。
(3)B过程的进行需要A过程为其提供________和________。
(4)在其他条件不变时,增加________数量可提高g的产量。
已知以下程序段:int a=3,b=4;a=a^b;b=b^a;a=a^b;则执行以上语句后a和b的值分别是________。
No more having to buy expensive textbooks which you will only use for a year or two and then sell or _______ away.
A student will probably attend four or five courses during each ________.
He asked me ___________ Zhang Hua came to school or not.
— What would you like to have, meat or fish?
— _____________________.
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
It's ___________ to point to or talk about strangers in public.
— ___________________
— Once or twice a week.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
—________________ about it now?
—Every time a customer has complained we've followed our store policy and offered them an exchange or a full refund.
读“地球公转示意图”,回答问题.
(1)地球公转的方向是______.
(2)写出图中A、B、C、D四处代表的节气名称.
A、______;B、______;
C、______;D、______.
(3)当地球转到A位置时,岳阳市日期大致是______,昼夜长短情况是______.
读极点地区的太阳照射图(如图所示),图中箭头表示地球自转方向,阴影地区表示黑夜,回答:
(1)图中B点在五个温度带中处于______带,A点在B点的______方向.
(2)若图中相邻经线相差45°,当B地位9:00时,A地的时间为______.
(3)此时是北半球的______节气,资阳的昼夜长短情况为______.
如图脐带血管有3条,A是______,B是______。血管周围胶样结缔组织如图中C称为______。
分别标出如图所示1_______________2_______________3_____________4___________为哪根血管。
分别标出如图所示1_______________2_______________3_____________4___________为哪根血管。
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