單項(xiàng)選擇題
At present, to possess a reasonable amount of foreign reserves is beneficial for China because____（）
At present, to possess a reasonable amount of foreign reserves is beneficial for China because____（）
單項(xiàng)選擇題
According to trade statistics, China’s trade surplus mainly comes from its trade with_____（）
According to trade statistics, China’s trade surplus mainly comes from its trade with_____（）
單項(xiàng)選擇題
在信號(hào)傳輸過(guò)程中，當(dāng)調(diào)制波包在色散媒質(zhì)中傳播一定距離時(shí)，波包的形狀發(fā)生畸變，導(dǎo)致信號(hào)失真，稱(chēng)為（ ）。
在信號(hào)傳輸過(guò)程中，當(dāng)調(diào)制波包在色散媒質(zhì)中傳播一定距離時(shí)，波包的形狀發(fā)生畸變，導(dǎo)致信號(hào)失真，稱(chēng)為（ ）。
單項(xiàng)選擇題
At present, the Belt & Road Initiative involves a lot of areas across the world, including_____（）
At present, the Belt & Road Initiative involves a lot of areas across the world, including_____（）