A portfolio of stock E and options on stock E is currently delta neutral, but has a positive gamma. Which of the following actions will make the portfolio with both delta and gamma neutral?（ ） A: Buy call options on stock E and sell stock E B: Sell put options on stock E and sell stock E C: Buy put options on stock E and buy stock E D: Sell call options on stock E and sell stock E

（单选题）不确定关系的表达式为 A: \(\Delta x\Delta v_x\leq h\) B: \(\Delta x\Delta p_x\leq h\) C: \(\Delta x\Delta p_x\geq h\) D: \(\Delta x\Delta p_x > h\)

The neutral culture in the emotional expression refers to a culture that recognizes neutral images.

When member is subjected to the eccentric loads, the wrong description of neutral axis is ( ). A: The position of the neutral axis is independent of external forces and eccentricity B: The neutral axis and the point of the external force are on opposite sides of the cross section centroid respectively C: The neutral axis is related to the shape and size of the section D: The closer the external force point is to the centroid, the farther the neutral axis is from the centroid

In<br/>the acid-base titration of aspirin, neutral ethanol is required to be<br/>used as the solvent. What is the meaning of calling "neutral"?() A: neutral<br/>to the indicator used B: pH=7 C: ethanol<br/>to remove acidic impurities D: It<br/>is neutral to methyl orange E: relative<br/>to the tested substance

Is the following sentence formal, neutral or informal?We can assist in the solution of this matter. A: Informal B: Formal C: Neutral

Is the following sentence formal, neutral or informal?Any loss of this document should be reported. A: Informal B: Formal C: Neutral

They have maintained a ( ) neutral stance.

Is the following sentence formal, neutral or informal? Wanna fix something up for next week? A: Neutral B: Formal C: Informal

15. They have maintained a ( ) neutral stance.