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搜题
【单选题】
不属于颅中窝的结构是( )A.
垂体窝
B.
内耳门
C.
卵圆孔
D.
棘
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皮皮学刷刷变学霸
举一反三
【单选题】We were swimming in the lake suddenly the storm started.
A.
When
B.
while
C.
until
D.
before
【单选题】电路如图 3 - 11 所示,已知电源电动势 E 1 = 6 V 、 E 2 = 1 V , 电源内阻不计, 电阻 R 1 = 1Ω , R 2 = 2Ω , R 3 = 3Ω。则 R 3 上的电流。
A.
3A
B.
2A
C.
1A
D.
5A
【单选题】已知集合A={x|x 2 -4x+3≤0}，集合B为函数 y= x-2 的定义域，则A∩B等于（ ）
A.
{x|1≤x≤2}
B.
{x|2≤x≤3}
C.
{x|x≥2}
D.
{x|x≥3}
【单选题】By “people skill” the author means _____________.
A.
the inclination to be considerate of others
B.
the capacity to look into other people’s minds
C.
the ability to establish good interpersonal relation
D.
the skills of dealing with different kinds of people
【单选题】We were swimming in the lakesuddenly the storm started．
A.
when
B.
while
C.
until
D.
before
【简答题】如图所示,已知电源电动势 E=2V ,内电阻不计,外电路电阻 R1=1 Ω, R2= Ω, R3=3 Ω, R4=6 Ω。求: A 、 B 、 C 、 D 四点的电位?
【单选题】已知集合A={x|x 2 -5x+6≤0}，B={x||2x-1|＞3}，则集合A∩B=（ ）
A.
{x|2≤x≤3}
B.
{x|2≤x＜3}
C.
{x|2＜x≤3}
D.
{x|-1＜x＜3}
【简答题】如图所示,已知电源电动势E 1 =18V,E 3 =5V,内阻r 1 =1Ω, r 2 =1Ω,外电阻R 1 =4Ω, R 2 =2Ω, R 3 =6Ω, R 4 =10Ω,电压表的读数是28V,求电源电动势E 2 和A、B、C、D各点的电位。
【简答题】计算题：如图所示，已知电源电动势E 1 ＝6V，E 2 ＝1V，电源内阻不计，电阻R 1 ＝1Ω，R 2 ＝2Ω，R 3 ＝3Ω，试用支路电流法求各支路的电流。
【单选题】We were swimming in the lake _____ suddenly the storm started.
A.
when
B.
until
C.
while
D.
before
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