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向日葵、甜菜、高粱和棉花属耐酸性植物。()
向日葵、甜菜、高粱和棉花属耐酸性植物。()
A．thatB．whoC．whenD．which

A、that
B．who
C．when
D．which
下列选项中谁是传统教育理论的代表()A．凯洛夫B．马卡连柯C．赫尔巴特D．杜威
下列选项中谁是传统教育理论的代表 ()
A．凯洛夫
B、马卡连柯
C．赫尔巴特
D、杜威
下列哪项不属于症状A．头痛B．颈静脉怒张C．心悸D．发热E．腹痛
下列哪项不属于症状 A．头痛 B．颈静脉怒张 C．心悸 D．发热 E．腹痛
______abindingcontractlastyearanditissti
______ a binding contract last year and it is still valid.A．We have signed
B．We haven't signed
C．We signed
D．We had signed
A．comesB．beginsC．appearsD．shines

A、comes
B．begins
C．appears
D．shines
IcannotaffordthecolorTVset.Tome,fourhund
I cannot afford the color TV set. To me, four hundred dollars ______ a lot of money.A．is
B．are
C．was
D．were
OneoftheindustrialgiantswhochangedAmeric
One of the industrial giants who changedAmerican society was Henry Ford horn on a farm in Michigan in 1863, and he grew up to bring forth some of the most revolutionary improvements in automotive technology in the early 20th century. His outstanding mechanical ability led him to become interested in the new automobiles in the early 1900s. Though be did not invent the automobile, he improved upon everyone else’s designs. He was a person who believed in inexpensive, efficient production, so he established standards for his plants and workers. He also standardized and produced many new auto parts for his Ford MotorCompany cars. Then he studied the workers’ problems and thousands of automobiles per year. In fact, his plants had produced 15 million Model TS by 1927. Ford’s personality was not all thrift (节俭), efficiency and inventiveness, however. He was a man who was cold and who could not keep pace with the competition due to his own rigidity (严格). His company suffered because of his desire to maintain the existing state instead of meeting and beating the competition by changing his products. Finally, he saw that he must change or fail, therefore, he introduced a newtype engine and once again took over the automobile market. Ford left a legacy of millions of dollars, millions of jobs forAmerican workers, and millions of satisfied customers.
Henry Ford changed theAmerican society ______.

A、through great social revolution
B、through automotive technological revolution
C、through numerous mechanical inventions
D、through radical political reforms
心搏骤停后，重建人工循环最有效的方法是A．口对口人工呼吸B．气管插管控制呼吸C．
心搏骤停后，重建人工循环最有效的方法是
A．口对口人工呼吸
B．气管插管控制呼吸
C．有效的胸外或胸内心脏按摩
D．提升血压
E．心内注射
设函数在x=0处连续，求常数a和b的值．
设函数
在x=0处连续，求常数a和b的值．