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【简答题】
已知直线a过点A（0，5）、B（5，0），直线b过点C （-2，0）、B（0，1），两直线相交于E点。 （1）求直线a、b的解析式； （2）求E点的坐标和△BCE的面积。
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举一反三
【单选题】设某人潮气量为500ml,无效腔容量为150ml,呼吸频率为12次/分钟,心输出量为5L/min,其通气/血流比值为
A.
1.2
B.
0.6
C.
0.84
D.
1.8
E.
3.0
【单选题】设某人潮气量为500ml,无效腔容量为150ml,呼吸频率为12次/分,心输出量为5L/分,其通气/血流比值为
A.
1.2
B.
0.6
C.
0.84
D.
1.8
E.
3
【单选题】Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you ...
A.
Kings and queens, princes and princesses, and lords and ladies built castles in order to get more land. .
B.
Around the outside of a castle, a moat was dug, which was often filled with water.
C.
A castle was built behind a thick end high stonewall, which was strong enough to stand the possible attack of enemies.
D.
If a drawbridge was pulled up, there was no way for people to enter the castle.
【单选题】Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you ...
A.
Kings and queens, princes and princesses, and lords and ladies built castles in order to get more land.
B.
Around the outside of a castle, a moat was dug, which was often filled with water.
C.
A castle was built behind a thick and high stonewall, which was strong enough to stand the possible attack of enemies.
D.
If a drawbridge was pulled up, there was no way for people to enter the castle.
【单选题】听力原文：W: Have you heard of any famous Canadian actors and singers? Many of them began heir careers in Canada before heading south to the larger audiences of the United States. There they have become po...
A.
In Africa.
B.
In Britain.
C.
In Canada.
D.
In Southern America.
【单选题】听力原文：W: I received an email yesterday from Henry. Do you remember? He was one of the chairpersons of our students union. M: Yes, but I haven't heard from him for ages. Actually, I've been out of touch...
A.
They were both chairpersons of the students' union.
B.
They have known each other since their schooldays.
C.
They are going to hold a reunion party.
D.
They have been in close touch by email.
【单选题】Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you ...
A.
Kings and queens, princes and princesses, and lords and ladies built castles in order to get more land.
B.
Around the outside of a castle, a moat was dug, which was often filled with water.
C.
A castle was built behind a thick and high stonewall, which was strong enough to stand the possible attack of enemies.
D.
If a drawbridge was pulled up, there was no way for people to enter the castle.
【单选题】设某人潮气量为 500ml ,无效腔容量为 150ml ,呼吸频率为 12 次 / 分钟, 其肺泡通气量和每分通气量分别是 :
A.
6L,4.2L
B.
5L,4.2L
C.
4.2L,6L
D.
2.4L,6L
E.
3L,6L
【单选题】下列关于肿瘤的描述,错误的是?
A.
成肾细胞瘤与肾母细胞瘤是一种肿瘤。主要来源于胚胎细胞未成熟组织。
B.
恶性肿瘤以膨胀性生长居多。
C.
良性肿瘤边界清楚，大多有包膜。
D.
恶性肿瘤有侵袭及蔓延现象。
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