The authors attitude towards the long-term influence of the oil spillage is one of______.
A．optimistic
B．uncertainty
C．concern
D．indignation

未分类题The authors attitude towards early screening for lung cancer is______.A．satisfactoryB．disappointedC．criticalD．objective

未分类题It is indicated in Paragraph 1 that______.A．seeing is not always believingB．healthy people also should always go to hospital for a cancer screeningC．through our own physiological system can we eradicate tumorsD．screening for lung cancer, to some extent, may do more harm than good

未分类题In Paragraph 5, the underlined word 'that study' refers to______.A．his own studyB．the study of cancer insulated from screeningC．the study involves screeningD．the study carried out by Claudia Henschke

未分类题It can be inferred from Paragraph 4 that______.A．marine animals cannot live within oxygen level 20% below normalB．the estimated amount of spilled oil is fully recognized by all partiesC．the dispersed oil will come inland in tiny specksD．one necessary condition for the digestion of bacteria is oxygen

未分类题The underlined word in Paragraph 6 refers to______.A．the damageB．the bacteriaC．the oilD．the chemical