配送是（）的经济活动。A.商物分离 B.商物合一 C.直达运输 D.短程运输

水泵并联扬程改变，流量为几台并联泵的总和。

试述室性期前收缩的心电图特征?

机舱和轴隧间舱壁上应设置符合规定的（）。

A.铰链式水密门

B.滑动式水密门

C.一级水密门

D.移动式水密门

请根据所提供的单据，判断“出境货物报检单”各项内容的正误。

NO.: SAQJ570162

DATE: DEC．10, 2009

The Buyer: BLUE EAGLE Import & Export Corp.LongBeachU.S.

The Seller: TIANJIN HAPPY-HOLIDAY CORPORATION

This contract is made by and between the Buyer and the Seller, whereby the Buyer agrees to buy and the Seller agrees to sell the under-mentioned commodity according to the terms and conditions stipulated below:

(1)Name of Commodity: WOODEN CHAIRS (HAPPY-HOLIDAY)

(2)Quantity: 1800PCS/3600KGS, 900CTNS

(3)Unit price: USD 4/PC

(4)Amount Total: USD7 200

(5)Packing: In Cartons

(6)Port of Loading: XINGANG, TIANJIN, CHINA

(7)Port of Destination: LongBeach U.S.

(8)Date of Shipment: DEC．2009/By Vessel

(9)Term of Payment: UC

(10)Shipping Mark: N/M

(11)Documents Required: phytosanitary certificate issued by CIQ indicating the

NO.of L/C

The Buyer The Seller

______ ______