皮皮学，免费搜题
登录
搜题
【单选题】
小容量晶体管调速器电路中的电压负反馈环节由R16、R3、()组成A.
RP6
B.
R9
C.
R16
D.
R20
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】下面是关于毛细血管的叙述,正确的是 1它是人体内数量最大、分布最广的血管 2它的管壁仅由一层上皮细胞构成 3它是实现血液与组织细胞间物质交换的重要结构 4它是连通最小动脉和静脉的血管
A.
①④
B.
①②
C.
①②④
D.
①②③④
【单选题】Foreign trade can be conducted on the following terms except for______.
A.
open account
B.
documentary collection
C.
documentary credits
D.
public bonds
【单选题】下列说法中，不属于毛细血管特点的是（ ）
A.
与动脉、静脉相比，分布最广，数量最多
B.
管壁薄，由单层上皮细胞构成
C.
血液速度慢，红细胞单行通过
D.
管壁厚，弹性大，管内血流速度快
【单选题】Which of the following statements is correct for an open economy with a trade surplus?
A.
The trade surplus cannot last for very many years.
B.
The trade surplus must be offset by negative net capital outflow.
C.
The trade surplus implies that the country's national saving is greater than domestic investment.
D.
None of the choices is correct.
【单选题】Public trade fairs are open to ( ).
A.
company representatives only
B.
certain people
C.
Chinese only
D.
the general pulic
【单选题】Countries that are open to international trade:
A.
cannot suffer from immiserizing growth.
B.
tend to grow faster than the closed economies.
C.
tend to lose out on the benefits of technological diffusion.
D.
do not experience biased growth.
相关题目：
【单选题】下列说法中，不属于毛细血管特点的是（ ）
A.
与动脉、静脉相比，分布最广，数量最多
B.
管壁薄，由单层上皮细胞构成
C.
血液速度慢，红细胞单行通过
D.
管壁厚，弹性大，管内血流速度快