供应链管理以效率为导向，而价值链管理以效果为导向。供应链管理以效率为导向，而价值链管理以效果为导向。 （）

A. 量本利分析杠杆

B. 措施导向杠杆

C. 价值杠杆

D. 关系导向杠杆

A.全球汇率变动状况

B.全球手机价值链生产供应状况

C.各国手机的价格及供需变化

D.各国对手机及其零部件进出口的政策导向

A、基础设施

B、政策导向

C、资金建设

D、经济建设

A．以内部供应链为中心  B．以供应商为中心

C．以网络管理为中心  D．以外部供应链为中心

E．进行全球性国际采购

In all my years as a scientist, including heading a billion-dollar U.S. research agency, this was the most significant invitation （） I had ever received to meet with a sitting national leader to hear his vision for science and discuss important global science matters.

A．简单句

B．并列句

C．复合句

D．并列复合句

In all my years as a scientist, including a billion-dollar U.S. research agency, this was the most invitation I had ever received to meet with a sitting national leader to hear his for science and discuss important science matters.

下面关于串口监视器的哪个说法是错误的。 The serial monitor is useful for debugging. The serial monitor is a program that executes on the Arduino. The serial monitor allows data to be sent from the Arduino to the host computer. The serial monitor allows data to be sent from the host computer to the Arduino.

A．串口监视器有助于程序调试

B．串口监视器是一个Arduino上的可执行程序

C．串口监视器可以从Arduino发送数据到电脑

D．串口监视器可以从电脑发送数据到Arduino