请回答:
据图推测,若要在诱导试管苗生根的过程中提高其光合作用能力,应()(降低,增加)培养基中蔗糖浓度,以便提高试管苗的自养能力。
参考答案:降低
九活汤中兼清里热的药物是()。
A.黄连、黄芩
B.黄芩、生地
C.黄连、黄柏
D.黄芩、桑白皮
E.生地、丹皮
Why did the United States first launch satellites into space a. To improve navigation for warplanes and warships. b. To guide smart bombs that home in on moving targets. c. To collect meteorological data. d. To sense remote volcanic eruptions.